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Low-temperature fast-curing epoxide powder paint and preparation method thereof

A fast-curing, epoxy powder technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., to achieve strong adhesion, lower coating temperature, excellent solvent resistance and acid resistance

Active Publication Date: 2014-03-26
洛阳双瑞防腐工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the above prior art, the object of the present invention is to provide a low-temperature fast-curing epoxy powder coating, which is an epoxy powder coating suitable for heat-sensitive substrates and has excellent anti-corrosion performance, environmental protection and energy saving, and solves the problem of Solved the problem that the powder coating process requires both low temperature and high efficiency in the market. The resulting paint film not only has the advantages of strong adhesion and alkali resistance of epoxy resin, but also has the water resistance and solvent resistance of phenolic resin. And acid resistance, etc., and the paint film has good heat resistance, excellent resistance to cathodic disbonding, and has a good market application prospect

Method used

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  • Low-temperature fast-curing epoxide powder paint and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] A low-temperature fast-curing epoxy powder coating has the following formula by weight percentage: 30 parts of bisphenol A epoxy resin, 15 parts of novolak epoxy resin, 1 part of triglycidyl isocyanurate, long-chain polyamine curing agent 8 parts, 0.1 part of diphenyl imidazoline, 30 parts of precipitated barium sulfate, 8 parts of mica powder, 5 parts of titanium dioxide, 1 part of titanate coupling agent, 1 part of general leveling agent, 0.5 part of benzophenone , 0.3 parts of fumed silica.

[0022] The preparation process is as follows:

[0023] (1) Weigh epoxy resin, curing agent, pigments and fillers and additives according to the formula dosage, and pre-mix on a high-speed mixer for 3 minutes.

[0024] (2) Use a twin-screw extruder with a screw length-to-diameter ratio of 16:1 and a rotational speed of 500r / min for melt extrusion. The temperature in zone I is set at 120°C, the temperature in zone II is set at 97°C, and the temperature in zone III is set at The ...

Embodiment 2

[0027] A low-temperature fast-curing epoxy powder coating has the following formula by weight percentage: 52 parts of bisphenol A epoxy resin, 13 parts of novolac epoxy resin, 5 parts of triglycidyl isocyanurate, long-chain polyamine curing agent 18 parts, 0.5 part of diphenylimidazoline, 4 parts of precipitated barium sulfate, 4 parts of mica powder, 2 parts of titanium dioxide, 0.5 part of titanate coupling agent, 0.5 part of general leveling agent, 0.4 part of benzophenone , 0.1 part of fumed silica.

[0028] The preparation process is as follows:

[0029] (1) Weigh epoxy resin, curing agent, pigments and fillers and additives according to the formula dosage, and pre-mix on a high-speed mixer for 5 minutes.

[0030] (2) A twin-screw extruder with a screw length-to-diameter ratio of 16:1 and a rotational speed of 500r / min is used for melt extrusion. The temperature in zone I is set at 110°C, the temperature in zone II is set at 90°C, and the temperature in zone III is set a...

Embodiment 3

[0033] A low-temperature fast-curing epoxy powder coating has the following formula by weight percentage: 45 parts of bisphenol A epoxy resin, 15 parts of novolac epoxy resin, 3 parts of triglycidyl isocyanurate, long-chain polyamine curing agent 15 parts, 0.4 parts of dimethylimidazole, 9 parts of precipitated barium sulfate, 6 parts of mica powder, 3.8 parts of titanium dioxide, 0.8 parts of silane coupling agent, 0.8 parts of general leveling agent, 1 part of benzophenone, gas phase dioxide Silicon 0.2 parts.

[0034] The preparation process is as follows:

[0035] (1) Weigh epoxy resin, curing agent, pigments and fillers and additives according to the formula dosage, and pre-mix on a high-speed mixer for 5 minutes.

[0036] (2) A twin-screw extruder with a screw length-to-diameter ratio of 16:1 and a rotational speed of 500r / min is used for melt extrusion. The temperature in zone I is set at 115°C, the temperature in zone II is set at 95°C, and the temperature in zone III...

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Abstract

The invention relates to low-temperature fast-curing epoxide powder paint which comprises the following components in percentage by weight: 45-65% of epoxy resin, 1-5% of polyepoxy active crosslinking agent, 8-18% of curing agent, 0.1-0.5% of curing accelerating agent, 4-30% of precipitated barium sulfate, 4-8% of mica powder, 2-5% of titanium white, 0.5-1.0% of adhesion accelerating agent and assistants. According to the invention, the epoxide powder paint uses a blended resin system of high molecular weight bisphenol A type epoxy resin and novolac epoxy resin; and after being cured by the curing agent, an obtained paint film has the advantages of the epoxy resin such as high adhesion and good alkali resistance and the characteristics of the novolac resin such as favorable water resistance, solvent resistance and acid resistance, and the paint film has favorable heat resistance. Thus, the epoxide powder paint provided by the invention can be adapted to a high-temperature severe-corrosion environment and has favorable market application prospects.

Description

Technical field [0001] The present invention is the field of powder coating, which involves a low -temperature rapid cured epoxy powder coating and its preparation methods. Background technique [0002] With the rapid development of the domestic economy, the amount of oil and natural gas increased year by year, leading to the increasing demand for the construction of oil and trachea.Because natural gas and oil are mostly concentrated in extreme environmental areas such as desert, polar frozen soil belts, and ocean, higher requirements have been put on the reliability and economy of transportation pipelines.In order to ensure the structural stability, safety and economy of the pipeline, the use of high -steel pipeline steel (X80, X100, X120) will become the development trend of future pipeline construction.Powder coatings are a recognized 4E -type coating product of high production efficiency, excellent coating film performance, ecological environmental protection, and economy. It...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D163/04C09D5/08C09D7/12
Inventor 张延奎
Owner 洛阳双瑞防腐工程技术有限公司
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